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Taxonomy > Calyptraeidae > Crucibulum < Previous species - Next species > (within the family) Crucibulum umbrella (Deshayes, 1830) Keen (1971) Sea shells of tropical West America. Marine Mollusks from Baja California to Peru. - p. 465 Hertz (1999) Illustration of the types named by S. Stillman Berry in his "Leaflets in Malacology" revised. Skoglund (2002) Panamic province molluscan literature: additions and changes from 1971 through 2000. III Gastropoda. - p. 74 Gurgo Salice & Cáceres (2021) Baja Californian sea shells. - p. 32 Gurgo Salice & Cáceres (2021) Baja Californian sea shells. - p. 32 [as Crucibulum cyclopium] Statistics Frequency common - 51 localities (25.89 %) Sediment 63 (0 fine >> 100 coarse sediment) Size and comments The maximum diameter of 87mm as reported by the literature is not reached by finds from the Gulf that remain below 50mm. Images Larger diameter 22.4mm. Taxonomy > Calyptraeidae > Crucibulum < Previous species - Next species > (within the family)